Shade effects on the hybrid Mavuno brachiariagrass (Urochloa spp.) as potential grass in agroforestry systems

Cruz, Priscila Junia Rodrigues da; Borges, Cláudia Eduarda; Santos, Maurinho Luiz dos; Magalhães, Marcela Azevedo; Martuscello, Janaína Azevedo; Fonseca, Dilermando Miranda da; Silva, Leandro Diego da

doi:10.1007/s10457-021-00636-4

“…The management of marandu grass plants in pre-pasture at a height of 50 cm, in the second year of conduction of the systems, resulted in higher levels of OC, N, Ca, Mg, S and P in the soil in relation to the other management of pasture. Similar results were found in a study by Cruz et al (2021), where the effect of 30% shading of Urochloa spp. Cv.…”

Section: Resultssupporting

confidence: 91%

Management of marandu grass pasture increases soil carbon and nitrogen stocks in forest grazing systems in the Brazilian Cerrado

Anésio

¹

,

Santos

²

,

Frazão

³

et al. 2023

Preprint

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This paper aimed to evaluate the influence of management practices of marandu grass, at eucalyptus shading levels in a forest grazing system, on organic carbon (OC) and nitrogen (N) stocks, and on soil chemical characteristics in the Brazilian Cerrado. The experimental design adopted was entirely random with five repetitions. In the plots were allocated the environments with different light availability, and a treatment with marandu grass in full sun. The management of marandu grass pasture was distributed in the subplots with pre-pasture at 30, 40, 50, and 60 cm high. Evaluations were repeated in two crop cycles in year 1 and year 2. Soil chemical characteristics, OC and N stocks were analyzed. The management of marandu grass at 50 cm height in the forest grazing system provided higher levels of OC, N, organic matter in the soil and an increase in fertility, compared to monoculture pasture, with repercussions in two years. The integration of eucalyptus and marandu grass pasture contributes with greater stocks of OC and N in the soil strips closest to the tree row, due to greater nutrient cycling. Marandu grass in forest grazing systems with shading varying from 40 to 60% present greater efficiency and maintenance of soil chemical attributes, demonstrating greater sustainability compared to monoculture pastures.

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“…The management of marandu grass plants in pre-pasture at a height of 50 cm, in the second year of conduction of the systems, resulted in higher levels of OC, N, Ca, Mg, S and P in the soil in relation to the other management of pasture (Table 2). Similar results were found in a study by Cruz et al, (2021), where the effect of 30% shading of Urochloa spp. Cv.…”

Section: Discussionsupporting

confidence: 91%

“…When evaluating forage management heights in each year of evaluation it was observed that the soil of plants managed at 50 cm presents higher values of S and P. Possibly, this occurs because plants managed at this height result in greater ow of forage tissues returning to the environment. This is because forage plants grown under shading exhibit strategies to compensate for reduced RFA in the understory, such as stem and leaf elongation; increases in chlorophylls, water use e ciency, leaf life span, and plant height, in uencing their management (Cruz et al, 2021;Cruz et al, 2020;Machado et al, 2020).…”

Section: Discussionmentioning

confidence: 99%

Management of marandu grass pasture increases soil carbon and nitrogen stocks in forest grazing systems in the brazilian cerrado

Anésio,

Santos,

Frazão

et al. 2024

Preprint

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0

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This paper aimed to evaluate the influence of management practices of marandu grass, at eucalyptus shading levels in a forest grazing system, on organic carbon (OC) and nitrogen (N) stocks, and on soil chemical characteristics in the Brazilian Cerrado. The experimental design adopted was entirely random with five repetitions. In the plots were allocated the environments with different light availability, and a treatment with marandu grass in full sun. The management of marandu grass pasture was distributed in the subplots with pre-pasture at 30, 40, 50, and 60 cm high. Evaluations were repeated in two crop cycles in year 1 and year 2. Soil chemical characteristics, OC and N stocks were analyzed. The management of marandu grass at 50 cm height in the forest grazing system provided higher levels of OC, N, organic matter in the soil and an increase in fertility, compared to monoculture pasture, with repercussions in two years. The integration of eucalyptus and marandu grass pasture contributes with greater stocks of OC and N in the soil strips closest to the tree row, due to greater nutrient cycling. Marandu grass in forest grazing systems with shading varying from 40 to 60% present greater efficiency and maintenance of soil chemical attributes, demonstrating greater sustainability compared to monoculture pastures.

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“…In the specific case of photosynthesis, light signal is received by pigments (chlorophyll and carotenoids), and the response is directly proportional to the amount of energy received (PAR) up to the light saturation point of a given leaf (Taiz et al, 2015). Cruz et al (2021) reported a linear increase in the concentration of chlorophyll a and b in leaves as shading percentage increased. Plants growing under conditions of low radiation develop more grana (Shao et al, 2014), which are a set of stacked membranous discs (thylakoid) containing chlorophyll and located on chloroplasts (Taiz et al, 2015).…”

Section: Morpho-physiological Characteristicsmentioning

confidence: 98%

“…According to Malaviya, Baig, Kumar, and Kaushal (2020) and Cruz et al (2021), leaves of plants growing under conditions of low light, such as forages grown in SPS have greater concentration of chlorophylls than those growing in full sunlight. Moreover, such environmental conditions may modify other chemical, morphological, and…”

Section: Introductionmentioning

confidence: 99%

Morpho-physiological and anatomical characteristics of Urochloa brizantha cv. Marandu in silvopastoral and monoculture systems

Sousa

¹

,

Moreira

²

,

Filho

³

et al. 2023

Acta Sci. Anim. Sci.

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To gain insights into the forage morphological and anatomical characteristics in a silvopastoral system (SPS) with Bolsa de Pastor (Zeyheria tuberculosa) and palisadegrass ‘Marandu’ (Urochloa brizantha) monoculture (MONO). The SPS was established through natural regeneration of the tree species. Treatments were a SPS and MONO distributed in a completely randomized design with six replicates and repeated measures were the harvest periods. Response variables were morpho-physiological and anatomical characteristicss: green: dead material ratio, leaf blade: stem+sheath ratio, leaf area index, chlorophyll and carotenoid concentrations, proportions of non-lignified and achlorophyllous areas, lignified areas in stems, proportions of non-lignified and achlorophyllous areas, lignified and chlorophyllous areas in leaves, as well as cell length in longitudinal section of stem. Morpho-physiological patterns were altered (p < 0.05) under natural shading conditions due to higher photosynthetic efficiency in the SPS. There was no effect (p > 0.05) of the systems on anatomical patterns, proportions of non-lignified and achlorophyllous, lignified and chlorophyllous tissues, these proportions were influenced only by the periods of the year, both for stems and leaves. Cells of the internodes of the grasses of the studied systems had the same length. The SPS alters morpho-physiological characteristics of palisadegrass and increases the concentration of chlorophyll a and b.

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Shade effects on the hybrid Mavuno brachiariagrass (Urochloa spp.) as potential grass in agroforestry systems

Cited by 7 publications

References 6 publications

Management of marandu grass pasture increases soil carbon and nitrogen stocks in forest grazing systems in the Brazilian Cerrado

Management of marandu grass pasture increases soil carbon and nitrogen stocks in forest grazing systems in the Brazilian Cerrado

Management of marandu grass pasture increases soil carbon and nitrogen stocks in forest grazing systems in the brazilian cerrado

Morpho-physiological and anatomical characteristics of Urochloa brizantha cv. Marandu in silvopastoral and monoculture systems

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